426 results about "Cyclopentanone" patented technology

The invention relates to a synthetic route of a hydrocarbon fuel with high density and high volumetric calorific value by using a lignocelluloses-based platform chemical compound as a raw material and completely independent of fossil energy. A liquid fuel obtained by the method can be used in various aircrafts or used as an additive to raise combustion performance of aviation fuel. The method is divided into two parts: 1) under the promotion action of an acid/base catalyst, cyclopentanone (furfural selective hydrogenation product) is subjected to an aldol self-condensation reaction to synthesize unsaturated organic compounds with C10 and C15 polycyclic structures; and 2) a metal loaded A/X catalyst is used to carry out a one-step hydrodeoxygenation and hydrogenation reaction on products generated from the step 1 under low-temperature solvent-free conditions, so as to obtain polycyclic hydrocarbon fuel with carbon number being 10 and 15. The liquid fuel has high density (C10: 0.92g/cm<3>; C15: 1.12g/cm<3>), can be used to effectively raise carrying energy of an aircraft and reduce fuel consumption rate, and meets requirements of high navigational speed, large load and long range.

This invention relates to curcumin analogs and their applications. Curcumin is an excellent precursor compound, and has multiple pharmaceutical activities. The curcumin analogs in this invention have more stable monocarbonyl intermediate connection chain structure. The connection chain can be acetone, cyclopentanone or cyclohexanone. The substituent on benzene ring can be separately selected from H, hydroxyl, halogen, alkoxyl, alkyl, halogenated alkyl, amino, and alkyl amino. This invention also discloses pharmaceutically acceptable salts of the curcumin analogs, preparations containing them, and their pharmaceutical applications. Experiments show that the curcumin analogs can be used to treat inflammation and tumor.

Novel processes for preparing optically active cyclopentanones 1

which are useful for the preparation of benzindene Prostaglandins and novel cyclopentanones are provided. The invention also provides novel processes of preparing benzindene Prostaglandins and novel intermediates for benzindene Prostaglandins.

The invention relates to a catalyst which using N-doped porous carbon as a carrier to support metal. The catalyst is composed of 0.1wt%-30wt% of metal particles and 70wt%-99.9wt% of bio-N-doped porous carbon carrier, and can be used for catalyzing aqueous phase hydrogenation of bio-furfural to highly selectively prepare furfural alcohol or cyclopentanone. The catalyst uses the raw materials which are renewable resources, wide in distribution, green and environmental, simple and easy to obtain, rich in resource, low in cost, free from inactivation when recycled for more than 50 times, and stable to air, water and heat. For example, in reaction of catalyzing the hydrogenation of the furfural to prepare the furfural alcohol, conversion rate of the supported metal catalyst can reach 100% and selectivity of the furfural alcohol is larger than 99% in an aqueous phase system.

The invention provides a method for preparing cyclopentanone and/or cyclopentanol by furfural or furfuryl alcohol. The method includes the following steps of firstly, mixing furfural or furfuryl alcohol with solvent according to proportion; secondly, adding catalyst with hydrogenating function into the mixture in the first step; and thirdly, reacting in the reducing atmosphere to obtain cyclopentanone and/or cyclopentanol. The method for preparing cyclopentanone and/or cyclopentanol by furfural or furfural alcohol is high in yield of the cyclopentanone and/or cyclopentanol, and further, is simple in process, convenient to operate, mild in reaction conditions, no carbon deposition is caused during the whole reaction, the catalyst is low in cost and easy to obtain and can be reused without lowering activity.

A method to electrolytically polymerize aromatic hydrocarbons and oxidize cyclopentane structures within the hydrocarbons into cyclopentanone structures is disclosed including a method to electrolyze fluorene in the presence of an ester to produce poly(9-fluorenone). A method to electrolytically oxidize polymers having cyclopentane structures to polymers having cyclopentanone structures is also disclosed including a method to electrolyze poly(fluorene) to produce poly(9-fluorenone). In addition, a method to chemically oxidize polymers containing cyclopentane structures into polymers containing cyclopentanone structures is disclosed, including a method to oxidize poly(fluorene), with a chemically prepared oxidizing agent, to produce poly(9-fluroenone).

An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, the metallic nanofibers are between about 10 microns to about 100 microns in length, are between about 10 nm to about 120 nm in diameter, and are typically functionalized with a coating or partial coating of polyvinyl pyrrolidone or a similar compound. An exemplary metallic nanofiber ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanofibers; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, or mixtures thereof; and a viscosity modifier, resin, or binder such as polyvinyl pyrrolidone or a polyimide, for example.

The invention belongs to the technical field of biomass conversion utilization, and concretely relates to a method for preparing cyclopentanone by taking biomass resource as a raw material. The method comprises taking furfural coming from biomass as the raw material, taking a hydrogen-containing gas as a reducing agent, and in the presence of a metal supported type catalyst, performing hydrogenation rearrangement reaction in a high-pressure reaction kettle or a fixed bed reactor, so as to obtain cyclopentanone in one step, wherein the carrier of the metal supported type catalyst is selected from Nb2O5, H-ZSM-5 molecular sieve, HY molecular sieve, Fe2O3, ZrO2, Al2O3, SiO2, CeO2, MgO, active carbon, and TiO2 in various crystal forms, the active composition is selected from Au, Pt, Ru, Rh, Pd, Ir, Ni and Cu, and the active composition load capacity is 0.1-5% of the catalyst. The method is mild in reaction technological conditions, and cheap and easily-available in raw materials, is capable of realizing quantitative conversion of furfural to cyclopentanone, and belongs to an environment-friendly green chemical technology.

The present invention provides a catalyst for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol and a preparation method thereof, the catalyst is a supported catalyst comprising an active ingredient and a carrier; the active component is one or two substance selected from Cu, Ni, Ru, Pd or Pt; the carrier is a magnetic iron oxide with the formula of FeyOx, wherein the ratio y / x is greater than 2/3 and less than 1; and the mass of the active ingredient 2. 0 to 10.0% of the carrier mass. The present invention also discloses a method for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol by use of the catalyst. The method has the advantages of simple operating steps and easy controlled operating conditions. The synthesized catalyst has good catalytic effect, high cyclopentanone product selectivity, and magnetic property, a magnet is used to attract the catalyst, separation and recovery of the catalyst are facilitated, and the catalyst has good prospects.

The present invention provides novel processes for the preparation of a cyclopentanone of Formula II and a lactone of Formula I, which are useful in the production of prostaglandins:

wherein Z, R₂, R₃, X₁, X₂, and are as defined in the specification.

The invention also provides novel enantiomerically enriched compounds.

The invention discloses a preparation method of a catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural. The preparation method comprises the following steps: firstly, performing in situ synthesis of a hierarchical pore Y-type molecular sieve carrier by using a one-step hydrothermal crystallization process, and then preparing a molecular sieve loaded type catalyst by using a dipping process. The invention further discloses a method for preparing cyclopentanone through hydrogenation of water phase furfural in the presence of the catalyst. The method disclosed by the invention is simple in steps; and operation conditions are easily controlled. The synthesized hierarchical pore Y-type molecular sieve is relatively high in crystallization degree, contains micropores and mesopores, and also is large in specific surface area. The catalyst prepared by using the molecular sieve has a developed hierarchical pore structure to ensure that a reactant is quickly diffused and transferred; carbon deposition is not easily formed on the surface of the catalyst, and meanwhile, the side effects are reduced. Compared with a catalyst prepared by using a conventional molecular sieve, the catalyst has the advantages of remarkably increasing the reaction rate, increasing the yield of a target product, and being or in catalysis effect, and better in industrial prospect.

The present invention belongs to chemistry technology field, in particular to a method to synthesize lactone compound with cyclone oxide which is an environmental friendly catalyst. The present invention adopts a composite metal oxide MgO/SnO2compound as the catalyst, adopts hydrogen peroxide as the oxidant, and Benzonitrile together with 1,4-bensodioxanes as the solvents, then the cyclone oxide is catalyzed to synthesize the lactone compound in a specific reaction temperature. The present invention uses ketone adamantine, cyclohexanone, and cyclopentanone available in the market, and the yield can be as high as 90 percent in the mild condition. Meanwhile, because of the hydrogen peroxide adopted ad the oxidant, the oxidation methods in prior art is avoided such as peracid, all of which cause environmental problem, and the aim of environmental friendly catalyzing/conversion is accomplished. The present invention is low in price, but has suitability for industrialized production of lactone compound.

The invention discloses high purity metconazole and a preparation method thereof; the preparation is as follows: exocyclic double bond alpha, beta-unsaturated ketone (II) can be obtained by condensation reaction of cyclopentanone and p-chlorobenzaldehyde; then the exocyclic double bond alpha, beta-unsaturated ketone (II) is reacted with a methylation reagent to obtain alpha', alpha'-dimethyl substituted exocyclic double bond alpha, beta unsaturated ketone (III); then in the presence of a catalyst, the alpha', alpha'-dimethyl substituted exocyclic double bond alpha, beta unsaturated ketone (III) is reacted with hydrogen to obtain 2, 2-dimethyl-5-(4-chloro-benzyl) cyclopentanone (IV) with the double bond being reduced; an epoxypropane compound (V) is obtained by Johnson-Corey-Chaykovsky of the reduced product (IV); finally the epoxypropane compound (V) is reacted with 1, 2, 4 - triazole, and then the high purity metconazole (I) can be obtained by recrystallization. The preparing method has the advantages of chip and easy available raw materials, short route, good selectivity, high overall yield and good atom economy, and is very suitable for industrial production.

Disclosed herein are compounds comprising

or a pharmaceutically acceptable salt or a prodrug thereof, wherein a dashed line represents the presence or absence of a bond; Y is a carboxylic acid, sulfonic acid, or phosphonic acid functional group; or an amide or ester thereof comprising from 0 to 12 carbon atoms; or Y is hydroxymethyl or an ether thereof comprising from 0 to 12 carbon atoms; or Y is a tetrazolyl functional group;

A is —(CH₂)₆—, cis —CH₂—CH═CH—(CH₂)₃—, or —CH₂—C≡C—(CH₂)₃— wherein 1 or 2 carbons may be substituted with S or O;

B is hydrogen, C_1-6 hydrocarbyl, CN, CO₂H, or —(CH₂)_mX(CH₂)_pH, wherein m is at least 1 and the sum of m and p is from 1 to 5;

X is S or O;

J is H, CH₃, or CF₃;

D is a covalent bond, CH₂, O, or S; and

E is an aromatic heterobicyclic ring system which may have substituents comprising up to 6 non-hydrogen atoms each. Methods, compositions, and medicaments related thereto are also disclosed.

A method of manufacturing an image bearing member including forming a charge generation layer overlying an electroconductive substrate, forming a charge transport layer overlying the charge generation layer, the charge transport layer including a charge transport material having a molecular weight of from 600 to 900 and a binder resin, and forming a protection layer overlying the charge transport layer by applying a liquid application containing a polymerizable compound having a charge transport structure, a polymerizable compound having no charge transport structure, a filler, a polycarboxylic acid compound, and cyclopentanone and curing the polymerizable compound having a charge transport structure, and the polymerizable compound having no charge transport structure.

The invention discloses a Ti-V loaded aluminum-pillared montmorillonite heterogeneous catalyst which is prepared by using self-made aluminum-pillared montmorillonite as a carrier, respectively using an ethanol solution of titanium tetrachloride and an oxalate solution of ammonium metavanadate as steeping liquor, loading titanium and vanadium oxides into the aluminum-pillared montmorillonite by using an excess impregnation method and drying and roasting the aluminum-pillared montmorillonite. The invention has the following advantages: raw materials are easily available; a preparation method is simple and is easy to operate; and the prepared catalyst has high activity and good stability. When the catalyst is used for a gas-solid phase reaction for synthesis of 2,3-cyclopentenopyridine from the raw materials comprising acrolein, cyclopentanone and ammonia gas, a good effect is obtained, and the catalyst is cheap and has a good development prospect.

This invention discloses three kinds of dentritic compounds based on cyano-substituted phenylquinoxaline, methyl-substituted phenylquinoxaline, and cyano-substituted phenylpyrazine. The preparation method comprises: reacting 4, 4'-dibromo dipheny ethanedione with trimethylsilico acetylene, reacting with tetraphenyl cyclopentanone to obtain a precursor, and reacting with 1, 2-diamino-4, 5-dicyanobenzene, 1, 2-diamino-4, 5-dimethylbenzene and 2, 3-diaminobutanedinitrile, respectively, to obtain corresponding dentritic compounds. The dentritic compounds can be used as luminescent and electron-transfer material to prepare OLED with high luminescent brightness and efficiency.

The invention relates to a method for preparing cyclopentanone through cyclopentanol dehydrogenation. The method comprises the steps of carrying out catalytic dehydrogenation and rectification reactions on the raw material cyclopentanol so as to directly obtain the high-purity cyclopentanone, wherein the catalytic dehydrogenation temperature is 85-115 DEG C, the system pressure is 100-300mmHg, and granular Raney nickel type metal alloy comprising 53% of Al, 44% of Ni and 3% of Mo is adopted as a catalyst in the dehydrogenation reaction; and the cyclopentanol load WWH of the catalyst is 2-4hr-1. The gas-phase dehydrogenation reaction product directly enters in a rectifying column of which the number of theoretical plates is 45 to be purified and the reflux ratio of the rectifying column is controlled to be (2:1)-(5:1)to ensure that a cyclopentanone product with the purity of more than 99.9% is obtained. Compared with the prior art, the method disclosed by the invention has the advantages that the energy consumption is low; the use efficiency of the catalyst is high; the production cost is greatly reduced; the purity of the obtained cyclopentanone product is more than 99.9%; and a green and environment-friendly production process is provided.

The invention relates to a novel method for preparing metconazole. The method takes p-chlorobenzaldehyde and 2-methoxycarbonyl cyclopentanone represented by the formula (1) as the primary raw materials, then after a series of reactions, obtains an intermediate of metconazole, namely 5-(4-chlorobenzyl)-2,2-dimethyl cyclopentanone represented by the formula (5); then subjects the intermediate to reacts with trimethylsulfonium bromide so as to obtain a reaction product, and finally subjects the reaction product to react with 1,2,4-1H-triazole so as to obtain the metconazole. The preparation method has the advantages of simple technology, available raw materials, low cost, little discharge of waste water, waste gas, and waste solid, and high content and yield of target product metconazole, wherein the metconazole content can reach 95% or more, and the total yield can reach 65% or more, and is suitable for industrial production.